Pneumatic hammer



FIG. 1 is a perspective view of a pneumatic hammer showing my new design;

FIG. 2 is a side elevational view of one side thereof;

FIG. 3 is a side elevational view of the other side thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof; and

FIG. 7 is a rear elevational view thereof. 

The ornamental design for a pneumatic hammer, as shown and described. 